Improvement in stop-valves



UNITED San/IFES PrvrENT OFFICE.

EDWARD ANDREWS, OF POTTSVILLE, PENNSYLVANIA.

IM PROVEM ENT IN STOP-VALVES.

Specification forming part of Letters Patent No. 5 1,533, (lated December 19, 1865.

To all whom it may Concern:

Be it known that I, EDWARD ANDREWS, of the borough of Pottsville, county of Schuylkill, in the State of Pennsylvania, have invented a Stop-Valve for Gage-Cocks and other Steam-Boiler Connections; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature ot'my invention consistsin providing a stop-valve to be used in boilers and other vessels having a pressure in them, between the gage-cocks, check-vaives, feed-pipes, and other connections, to allow the gage-cocks, feed and other pipes to be taken oft' the boilers for repairs without drawing the tires, blowingI ott' the steam, or letting the Water out, thereby preventing the stoppage ofthe machinery and expense attending the repairs ot' gage cocks and other boiler-connections.

Figure lis an exterior and end view, showing the valve shut. Fig. 2 is an interior and end view, showing the valve partly open, with the end ot' valve project-ing in the chamber C. Fig. 3 is a side and end vicw of valve B.

Similar letters indicate corresponding parts in the igures.

Toenable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

I construct the plug A, Figs. l and 2, with the chamber C, having the female thread in it, to allow the cock D to screw into it, also having a male thread on the taper end to screw into the boiler, and the six-sided flange for the wrench to fit on.

Through the center of the plug A is the hole for the valve B to slide in, as shown at Fig. 2, the valve B having its seat on the end ot the plugA and its Wings to extend into the chamber C as far as the valve Bis required to open when in operation.

The operation is as follows The plug A being fastened to the boiler, the pressure acting on the valve shuts it, and its end projecting into the chamber C allows the gage-cock D, on being screwed into the chamber, to strike the end ofthe valve and open it as far as is required; and it' the cock D is to be taken out for repairs it releases the valve and allows it to shut, thereby allowing the pressure to remain in the boiler, giving the advantages before described.

I wish it distinctly understood that I do not conne myself to screwing the plug A into boilers. It may be made with a tlange and bolted onto boilers, and it may also have a spring operating against the valve B to keep it shut when used in beer-barrels` or other ves sels containing pressure.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the plug A, chamber C, and valve B, for the purposes and in the manner set forth.

2. The combination ot' the plug A, chamber C, valve B, and gage-cock D, substantially as described.

EDWARD ANDREWS.

Witnesses: v

JAMES A. INNEss, S. MoDoNNELL. 

